CVE-2026-11829: CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in IBM MQ Operator
Description
CVE-2026-11829 is a medium severity vulnerability in IBM MQ Operator involving a classic buffer overflow (CWE-120). It allows an authenticated attacker to cause a denial of service by exploiting improper validation of offset values in MQOPEN requests. The vulnerability affects multiple specific versions of IBM MQ Operator. No known exploits are reported in the wild. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, and no user interaction required. Confidentiality and integrity are not impacted, but availability can be disrupted.
CVSS v3.1
Score 6.5medium
Affected software
IBM
MQ Operator
IBM
MQ Advanced container images
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
IBM MQ Operator contains a buffer overflow vulnerability (CWE-120) due to improper validation of offset values in MQOPEN requests. An authenticated attacker can exploit this flaw to cause a denial of service condition. The vulnerability affects a wide range of IBM MQ Operator versions, including multiple minor and patch releases across several major versions. The CVSS 3.1 score is 6.5, indicating a medium severity denial of service impact with network attack vector and low complexity. No known exploits in the wild have been reported. The vulnerability does not affect confidentiality or integrity but impacts availability.
Potential Impact
An authenticated attacker can cause a denial of service in IBM MQ Operator by exploiting improper validation of offset values in MQOPEN requests. This disrupts service availability but does not compromise confidentiality or integrity. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix information is provided, users should monitor IBM's advisories for updates. In the meantime, restrict access to IBM MQ Operator to trusted authenticated users only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-06-09T20:12:48.138Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad64a132cdf04f6566e6f3c
Added to database: 10/19/2026, 16:49:23 UTC
Last enriched: 10/19/2026, 17:06:22 UTC
Last updated: 10/19/2026, 19:06:46 UTC
Views: 6
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